Barcelona Tips?

Hello everyone! I'm packing for Barcelona and will be taking you with me via Instagram if you'd like to join! I'll post Insta Stories and photos there beginning tomorrow (Friday) until next Tuesday or Wednesday. I can't wait to show you what I'm seeing for the first time. I've never been so I'm quite excited. I've done little research on what to expect and what to see so if you have some good tips for my friend and I, we'd be so happy to hear them in the comments below.